Prof. Dr.

Ronny Ramlau

Managing Scientific Director

Group Leader
Transfer Group

www.indmath.uni-linz.ac.at/index.php/members/27-ramlau

Biographical sketch

  • born on July 23, 1966 in Annaberg-Buchholz, Germany
  • 1988/1994 Study of Mathematics at University of Potsdam, Germany
  • 1994: Diploma in Mathematics, University of Potsdam, Germany
  • 1997: Ph.D. in Mathematics, University of Potsdam, Germany
  • 2003: Habilitation, University of Bremen, Germany

Former and Current Positions

  • 1994-1997: Research Assistant, University of Potsdam, Germany
  • 1998 : Visiting Scholar, University of Salt Lake City, USA
  • 1999-2005: Research Assistant, University of Bremen, Germany
  • September-December 2003: Visiting scholar, Institute for Pure and Applied Mathematics (IPAM), UCLA, USA
  • September 2005 - August 2008: Senior Scientist in the group "Inverse Problems" at the RICAM
  • Since September 2008: Professor for Industrial Mathematics, Johannes Kepler University Linz
  • 03/2013-09/2014: Acting Director at RICAM
  • 10/2014-04/2015: Scientific Director at RICAM
  • 05/2015-07/2016: Managing Scientific Director at RICAM
  • 08/2016-2/2019: Scientific Director at RICAM
  • 03/2019-02/2021: Managing Scientific Director at RICAM

Visiting Positions and Offers

Memberships in Editorial Boards

Academic Honors and Awards

Excerpt:

  • Full member, Austrian Academy of Sciences
  • Full member and former member of the presidium, German Academy of Natural Sciences Leopoldina
  • Cardinal Innitzer Prize for Natural Sciences in Austria
  • Invited speaker at ICM 1998 (Berlin) and ICIAM 2003 (Sydney)
  • Singapore National Science Award 2003
  • 2013 Fellow of the American Mathematical Society

Professional Service

  • 1991-1997: Member of the Board of GAMM
  • 1992-2000: Board Member of the European Consortium for Mathematics in Industry (ECMI), President: 1994-1996
  • 1995-1999: Member of CICIAM
  • 1997-2001: Chairman of the Committee on Applied Mathematics of the European Mathematical Society
  • Member of the SIAM Committee on Programs
  • Member of many Program Committees including ICIAM1995, ICIAM2003, SIAM2002
  • Member of the Strategy Board of MACSINet
  • 1994-2003: Member of the Board of the Austrian Science Foundation FWF
  • 2003-2007: Member and vice-chair of the University Council of Graz University of Technology
  • since 2006: Member of the Editorial Board of the "Radon Series on Computational and Applied Mathematics", Walter de Gruyter GmbH & Co KG, Berlin/New York (2006-2014: Managing Editor)
     
  • Owner of MathConsult GmbH, the developer of the Financial Derivatives Pricing Tool UnRisk

Teaching

Research projects

Research Interests

  • nonlinear inverse problems
  • inverse problems in astronomy
  • regularization methods
  • iterative methods
  • medical imaging
  • mathematical methods in industry

Further Information

Member of Rotary Club Wien

Publications

Peer Reviewed Journal Publication

Peer Reviewed Journal Publication

  • Ramlau, R.; Dykes, L.; Reichel, L.; Soodhalter, K.; Wagner, R. (2021, online: 2020) Lanczos-based fast blind deconvolution methods. Journal of Computational and Applied Mathematics, Bd. Volume 382, S. 113067.
  • Sherina, E.; Krainz, L.; Hubmer, S.; Drexler, W.; Scherzer, O. (2020) Displacement field estimation from OCT images utilizing speckle information with applications in quantitative elastography. Inverse Problems, Bd. 36 (12), S. 124003.
  • Hubmer, Simon; Ramlau, Ronny (2020) A frame decomposition of the atmospheric tomography operator. Inverse Probl., Bd. 36 (9), S. ARTN 094001.
  • Hinterer, F.; Hubmer, S.; Ramlau, R. (2020) A note on the minimization of a Tikhonov functional with l 1-penalty. Inverse Problems, Bd. 36 (7), S. 074001.
  • Ke, Rihuan; Wagner, Roland; Ramlau, Ronny; Chan, Raymond (2020) Reconstruction of the High Resolution Phase in a Closed Loop Adaptive Optics. SIAM J. Imaging Sci., Bd. 13 (2), S. 775-806.
  • Shatokhina, J.; Hutterer, V.; Ramlau, R. (2020) Review on methods for wavefront reconstruction from pyramid wavefront sensor data. Journal of Astronomical Telescopes, Instruments and Systems, Bd. 6 (1), S. 010901.
  • Pöttinger, Markus; Ramlau, Ronny; Auzinger, Günter (2019) A new Temporal Control Approach for SCAO Systems. Inverse Problems (36(1)), S. 31.
  • Hutterer, Victoria; Ramlau, Ronny; Shatokhina, Iuliia (2019) Real-time adaptive optics with pyramid wavefront sensors:part II. Accurate wavefront reconstruction using iterative methods. Inverse Problems (35 (2019)), S. 045008 (27pp).
  • Ramlau, Ronny; Reichel, Lothar (2019) Error estimates for Arnoldi-Tikhonov regularization for ill-posed operator equations. Inverse Probl., Bd. 35 (5), S. ARTN 055002.
  • Hutterer, Victoria; Ramlau, Ronny; Shatokhina, Iuliia (2019) Real-time adaptive optics with pyramid wavefront sensors: part I. A theoretical analysis of the pyramid sensor model. Inverse Probl., Bd. 35 (4), S. ARTN 045007.
  • Jenny, Niebsch; Ronny, Ramlau (2018) Frequency-dependent reconstruction of imbalances. Electronic Transactions on Numerical Analysis (ETNA), Bd. 48, 2018, S. pp. 435–449.
  • Hutterer, Victoria; Shatokhina, Iuliia; Obereder, Andreas; Ramlau, Ronny (2018) Advanced wavefront reconstruction methods for segmented Extremely Large Telescope pupils using pyramid sensors. J. Astron. Telesc. Instrum. Syst., Bd. 4 (4), S. ARTN 049005.
  • Hutterer, Victoria; Ramlau, Ronny (2018) Nonlinear wavefront reconstruction methods for pyramid sensors using Landweber and Landweber-Kaczmarz iteration. Applied Optics, Bd. 57 (30), S. 8790-8804.
  • Ramlau, Ronny; Scherzer, Otmar (2018) The first 100 years of the Radon transform. Inverse Probl., Bd. 34 (9), S. ARTN 090201.
  • Hubmer, Simon; Ramlau, Ronny (2018) Nesterov's accelerated gradient method for nonlinear ill-posed problems with a locally convex residual functional. Inverse Probl., Bd. 34 (9), S. ARTN 095003.
  • S. Hubmer, A. Neubauer, R. Ramlau, H. U. Voss (2018) On the Parameter Estimation Problem of Magnetic Resonance Advection Imaging. Journal of Inverse Problems and Imaging, Bd. 12 (1), S. 175-204.
  • Buccini, Alessandro; Donatelli, Marco; Ramlau, Ronny (2018) A SEMIBLIND REGULARIZATION ALGORITHM FOR INVERSE PROBLEMS WITH APPLICATION TO IMAGE DEBLURRING. SIAM J. Sci. Comput., Bd. 40 (1), S. A452-A483.
  • Wagner, Roland; Ramlau, Ronny; Hofer, Christoph (2018) Point spread function reconstruction for single-conjugate adaptive optics on extremely large telescopes. Journal of Astronomical Telescopes, Instruments, and Systems, Bd. 4 (4), S. 049003.
  • Hutterer, Victoria; Shatokhina, Iuliia; Ramlau, Ronny (2018) Real-time Adaptive Optics with pyramid wavefront sensors: A theoretical analysis of the pyramid sensor model. Inverse Problems, Bd. forthcoming.
  • Hutterer, Victoria; Ramlau, Ronny; Shatokhina, Iuliia (2018) Real-time Adaptive Optics with pyramid wavefront sensors: Accurate wavefront reconstruction using iterative methods. Inverse Problems, Bd. forthcoming.

Book/Monograph

Book/Monograph

  • Ramlau, R.; Scherzer, O. (2019) 100 years Mathematical Tomography.
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Conference Contribution: Publication in Proceedings

Conference Contribution: Publication in Proceedings

  • Ramlau, Ronny; Zeilinger, Werner W.; Wagner, Roland; al., et (2020) MICADO PSF-reconstruction work package description. In: SPIE (Hrsg.) (Adaptive Optics Systems VII) In Reihe: Proc. SPIE 11448: SPIE.
  • Ramlau, Ronny; Stadler, Bernadett; Biasi, Roberto; Manetti, Mauro (2019) Feasibility of standard and novel solvers in atmospheric tomography for the ELT. In: AO4ELT (Hrsg.) (Adaptive Optics for Extremely Large Telescopes 6); Quebec, S. 9.
  • Hutterer, Victoria; Obereder, Andreas; Raffetseder, Stefan; etal. (2019) Model-based wavefront reconstruction tested on the LOOPS bench. In: AO4ELT6 (Hrsg.) (Adaptive Optics for Extremely Large Telescopes 6); Quebec.
  • Davies, Ric; Alves, João; Wagner, Roland; Niebsch, Jenny; Ramlau, Ronny et al. [..] (2018) The MICADO first light imager for the ELT: overview, operation, Simulation., Proceeding of the SPIE Astronomical Telescopes and Instrumentation Conference Austin 2018 (spie. Astronomical Telescopes and Instrumentation) In Reihe: 10702: Ground-based and Airborne Instrumentation for Astronomy VII, S. 107021S.
  • Hutterer, Victoria; Ramlau, Ronny; Shatokhina, Iuliia; Obereder, Andreas (2018) Wavefront reconstruction for ELT-sized telescopes with pyramid wavefront sensors. (spie astronomical telescopes and instrumentation); Austin, S. 10703 - 1070344 - 18.
  • Davies, R.; Schubert, J.; Hartl, M.; Alves, J.; Clenet, Y. et al. [..] (2016) MICADO: first light imager for the E-ELT., Proceedings SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI (Ground-based and Airborne Instrumentation for Astronomy VI conference); Edinburgh, S. 99081Z.
  • R. Ramlau, D. Saxenhuber, M. Yudytskiy (2014) Iterative reconstruction methods in atmospheric tomography: FEWHA, Kaczmarz and Gradient-based algorithm., SPIE, Bd. 31.
  • Jenny Niebsch, Ronny Ramlau, Christina Brandt (2011) Unbalances in ultra-precision cutting machinery and the relation to surface quality. (9. Internationale tagung Schwingungen in rotierenden Maschinen); Darmstadt.
  • Brandt C., Niebsch J., Maaß P., Ramlau R. (2010) Simulation of Process Machine Interaction for Ultra Precision Turning. (Proceedings of the 2nd International Conference on Process Machine Interactions); Vancouver.
  • Brandt, C.; Karimi, H.R.; Piotrowska, I.; Niebsch, J.; Ramlau, R.; Krause, A.; Riemer, O.; Maaß, P. (2008) Process Machine Interaction Model for Turning Processes., Proceedings of the 1st International Conference on Process Machine Interactions; Hannover.
  • Jenny Niebsch, Ronny Ramlau (2008) Mathematical Imbalance Determination from Vibrational Measurements and Industrial Applications. (2008 ASME DETC & Computers and Information in Engineering Conference (CIE) 2008).
  • Ronny Ramlau, ; Esther Klann, ; Ring, Wolfgang (2007) Simultaneous Reconstruction and Segmentation for Tomography Data. (Special Issue: Sixth International Congress on Industrial Applied Mathematics (ICIAM07) and GAMM Annual Meeting, Zürich 2007) In Reihe: PAMM; Weinheim: WILEY-VCH Verlag GmbH & Co. KGaA, S. 1050301-1050302.
  • Ramlau, R. (2006) Tikhonov regularization with non - standard constraints for Tomography. In: A. K. Louis, F. Natterer, E. T. Quinto (Hrsg.), Mathematical Methods in Tomography In Reihe: Oberwolfach Report, Bd. 34/2006, S. 62-64.
  • Jenny Niebsch, Ronny Ramlau Imbalances in high precision cutting machinery. (ASME 2009 International Design Engineering Technical Conferences IDETC); San Diego.
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Editorship

Editorship

  • (2019) The Radon Transform. The first 100 years and beyond. In Reihe: Radon Series on Computational and Applied Mathematics; Berlin: de Gruyter.
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Research Report

Research Report

  • Ramlau, Ronny; Koutschan, Christoph; Hofmann, Bernd (2018) On the singular value decomposition of n-fold integration operators. Bericht-Nr. 2018-29; RICAM: Linz.
  • Wagner, R.; Ramlau, R.; Davies, R.; Alves, J.; Kleijn, G. Verdoes (2018) Mathematical Algorithms for MICADO - First Light Instrument at the European Extremely Large Telescope, in: Mathematics with industry: driving innovation, ECMI Annual Report 2017 (ECMI - European Consortium for Mathematics in Industry).
  • M. Yudytskiy, T. Helin and R. Ramlau (2013) A frequency dependent preconditioned wavelet method for atmospheric tomography. Bericht-Nr. 2013-13; RICAM: Linz.
  • M. Yudytskiy, T. Helin and R. Ramlau (2013) A finite element-wavelet hybrid algorithm for atmospheric tomography. Bericht-Nr. 2013-14; RICAM: Linz.
  • G. Auzinger, A. Obereder, R. Ramlau, M. Rosensteiner, D. Saxenhuber and M. Yudytskiy (2013) AO3: Final Report. Bericht-Nr. 48; ESO:.
  • Klann, Esther; Ramlau, Ronny; Ring, Wolfgang (2009) A Mumford-Shah level-set approach for the inversion and segmentation of SPECT/CT data. Bericht-Nr. 2009-06; Johann Radon Institute for Computational and Applied Mathematics: Linz.
  • Klann, Esther; Ramlau, Ronny (2007) Regularization by fractional filter methods and data smoothing. Bericht-Nr. 2007-24; Johann Radon Institute for Computational and Applied Mathematics: Linz.
  • al., R Ramlau et Final Report AO1: Introductory study Austrian In-Kind Contribution Mathematical Algorithms and Software for ELT Adaptive Optics. Bericht-Nr. 2;.
  • Zhariy, G. Auzinger and A. Obereder and R. Ramlau and M. Rosensteiner and I. Shatokhina and M. Yudytskiy and M. Mid Term Review AO4: SCAO / XAO. Bericht-Nr. 16; ESO:.
  • Yudytskiy, T. Helin and A. Obereder and R. Ramlau and M. Rosensteiner and M. Mid Term Review AO2: MCAO. Bericht-Nr. 17; ESO:.
  • Rosensteiner, R. Ramlau and M. A Kaczmarz type reconstructor for MCAO data. Bericht-Nr. 19;.
  • Shatokhina, Iuliia Simulation of the non-modulated pyramid wavefront sensor. Bericht-Nr. 7;.
  • Shatokhina, Iuliia Simulation of the modulated pyramid and roof wavefront sensors. Bericht-Nr. 11;.
  • Rosensteiner, Matthias Solving the GLAO problem with the CuReD. Bericht-Nr. 9;.
  • Rosensteiner, Matthias The cumulative reconstructor - basics and first results. Bericht-Nr. 3;.
  • Rosensteiner, Matthias Wavefront reconstruction for Extremely Large Telescopes via CuRe with Domain Decomposition. Bericht-Nr. 18;.
  • Obereder, Andreas Simulation of the non-modulated pyramid wavefront sensor. Bericht-Nr. 1;.
  • Obereder, Andreas Eighteen months technical report of the austrian in-kind project AO. Bericht-Nr. 8;.
  • Obereder, Andreas Applying the CuRe on modulated Pyramid-WFS measurements. Bericht-Nr. 10;.
  • Auzinger, Günther Technical report on the SVD method for a wavefront reconstruction based on Shack-Hartmann sensor measurements. Bericht-Nr. 4;.

Other publication

Other publication

  • Obereder, Andreas; Ramlau, Ronny; Shatokhina, Iuliia Fast wavefront reconstruction algorithms for adaptive optics in astronomy. Conference Paper: Symposium on Mathematical Optics, Image Modelling and Algorithms, 20.-23. 6. 2016 Hanover, Germany.
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More Publications

More Publications

R. Ramlau, L. Dykes, L. Reichel, K. Soodhalter, R. Wagner
Lanczos-based fast blind deconvolution methods
Journal of Computational and Applied Mathematics, Vol. 382,  15 January 2021, 113067
https://doi.org/10.1016/j.cam.2020.113067

Hinterer, S. Hubmer, R. Ramlau
A note on the minimization of a Tikhonov functional with ℓ 1-penalty
Inverse Problems 36 (7), June 2020
https://doi.org/10.1088/1361-6420/ab89c2

I. Shatokhina, V. Hutterer, R. Ramlau
Review on methods for wavefront reconstruction from pyramid wavefront sensor data
Journal of Astronomical Telescopes, Instruments and Systems 6(1), 010901 (2020)
https://doi.org/10.1117/1.JATIS.6.1.010901

R. Ramlau, R. Ke, R. Wagner, R. Chan
Reconstruction of the High Resolution Phase in a Closed Loop Adaptive Optics System
SIAM Journal on Imaging Sciences, Vol. 13, Nb 2, p. 775-806, May 2020
DOI. 10.1137/19M1258426